Local records were meant to be broken.

By merging Craft's two flagship fabrics, the Pro Zero and the Pro Cool, the Active Extreme Concept Long Sleeve Top combines the moisture wicking genius of the Pro Zero with the moisture transference of the Pro Cool. This means that as you sweat, the Zero fibers pull the moisture away from your body while the Cool fibers pull the damp to the outer layer of the shirt. Once the moisture reaches the outer layer, the weave of the Cool fiber promotes air circulation away from the skin which dries the fabric without cooling you off at the same time. The top also incorporates an antimicrobial treatment that prevents fabric odor from setting in.

The base layer has been designed to regulate your body temperature in whatever zones require it. The seamless torso has an ergonomic fit, but doesn't pull uncomfortably at the underarms since the thin, lightweight fabric is also extremely elastic. It will hug, not cling to your body, and the flatlock seams succeed in making this base layer an ideal second skin.

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very warm while very thin/light

Craft got it right with this base layer. it is surprisingly warm while being thin/light/comfortable. I purchased it on sale with somewhat low expectations, but I am very pleased with it (my favorite base layer now for cool mornings). packs away incredibly easy, but breathes well enough to keep it on when the day warms up a bit. fits true to size (i'm 5/9" and weigh 160-lbs and I bought the medium).

Comment on Antonio O.'s review:

The first and still the best

Familiarity: I've put it through the wringer

Fit: True to size

I got my first Craft top about 20 years ago while Nordic ski racing. Still have it and many more Craft items. Hands down the best baselayer I have ever worn. Who's going to keep you warm and dry the Swedes or some company that makes lycra for football players. I probably wear a Craft item everyday for 5+ months of the year as a Nordic ski coach. It fits tight so it pulls the sweat off of your body. There have been countless times where I am doing Nordic ski intervals or racing my buddies up a skin track where you are soaked at the top but by the time you are ready to go down the Craft shirt has you dry, warm and ready for the next round. Sure the piece holds your stink but you are working out and the garlic burger and bourbon has to escape somewhere. Don't mess around with other baselayers just get Craft.

Comment on Steve Cook's review:

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Warm yet breathable

Familiarity: I've used it several times

Fit: True to size

Size Bought: XL

Big fan of the Craft baselayers, but found the windproof ones get a bit clammy on warmer than expected days. This one is perfect for providing breathable areas on the shoulders and pits while keeping the core and arms warm. This has become my go-to base for sub-45 deg days.

Comment on Adam's review:

Best baselayer yet

Familiarity: I've put it through the wringer

I am a major Craft fan and have several of their base layers but this is my new go to baselayer when the temps are varying and we are in for a hard ride. Its form fitting but not restrictive. I like the different materials to keep you comfortable and I think this is an improvement over past baselayers.

Comment on Thomas R.'s review:

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Excellent quality, works well

Familiarity: I've put it through the wringer

I'm 6'2", 175lbs, orginally bought M but traded it in for the L for the slightly longer sleeve. It is a very snug fit, but fits comfortably and does work well, keeping heat in around torso and arms, venting heat under the arms and shoulders. It's amazing how well it works. I put this under a wind breaker and stay warm down into the 30s.

Comment on Corry's review:

Fantastic baselayer

Familiarity: I've put it through the wringer

Fit: True to size

Size Bought: Medium

This is the best fitting and warmest baselayer I have ever used. It is fantastic for inbounds skiing with hot/cold rapid cycles, and for huge uphill treks while sweating buckets. It keeps the moisture away from the skin, is incredibly light but also very warm. I have 2 and will keep buying more. Keep up the great work Craft!

Comment on Christopher G.'s review:

Great shirt.

Familiarity: I've put it through the wringer

Fit: True to size

I have this one in black, and I use it for biking, skiing (both touring and resort), and running. I am always really impressed with Craft stuff, and this is no exception. It is light yet warm and never feels clammy (unlike, for example, some of my older arcteryx stuff). I have a variety of Craft base layers and they are truly my favorite. My only gripe (if this is indeed a gripe) is that the fabric (mainly the mesh under the arms) makes it so I would never wear this as a sole layer.

Comment on Jamie B.'s review:

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Great for base miles

Familiarity: I've put it through the wringer

Perfect base layer for those winter days when I don't go too hard. I use it with a light windstopper jacket and am comfortable from low 30s to mid 40s. With harder effort than HR zone 2 in the 40s, it is a tad too warm.

Comment on FuelForThought's review:

The most awesome tech wear I've found!!!

Bought for xc skiing. When climbing a long hill, you sweat, a lot, this design allows the heat to dissipate while keeping your arms warm and chest. I just cannot say enough about how much I love it and I'm very picky on design, fit, etc. used today on 25 km classic ski with 1000' gain.

Comment on James W.'s review:

I'd get another if they had black or craft red without the color blocking panel differences. I like the fabric being different, that's function, but the aesthetics would slick in solid color with just deviated stitching .